Electric fixture



F.'L. BUTLER. ELECTRIC FIXTURE. .APPLICATION FILED 06]'. 2. \920.

Patented 1m 27, 1921.

UNITED sTATss raffiner OFFICE.

ELECTRIC FIXTURE.

Specification of Letters Patent.

Patented Dee. 27, 1921.

VApplication led Detobcr 2, 1920. Serial No. 414,211.

To all 'whom it may concern.'

Be it known that I, Fawn l'iowum;J Bur LER, a citizen of the UnitedStates. and a residentof Chicago, in the county ot' Cook and State ofIllinois, have invented a new and useful Improvement in ElectricFixtures, of which the following is a full7 clear, and exactdescription.

My invention relates to imyn'oveinents in electric fixtures, and itconsists in the combinations, constructions,4 and arrangements hereindescribed and claimed.

Anobject of my invention to provide in` an electric fixture an insulatedstein adapted to insulate a lighting fixture or the like that dependstherefrom from a fixed support without it being necessary to provide theusual insulating joint.

A further object ofniy invention is to provide a device of the typedescribed that 1s at once simple in construction, ornamental inappearance, and effective for the purpose intended.

A furtherobject of my invention is to provide a device of the typedescribed that `can be readily manufactured in large quantities at arelatively small cost, and which is thoroughly practical commercially.

Other objects and advantages will appear in the following specieation,and the novel features ofthe invention will be pa rt'icnlarli7 pointedout in the appended claims.

My invention is illustrated in the accom panying drawings, forming partof this ap plication, in which Figure l is a central section through thedevice,

Fig. 2 is a plan view of a portion of the device,

Fig. 3 is a side view of the portion of the device shown in Fig. 2.

. In carrying out my invention, I make use of a suitable fixed support,such as a gas pipe l, that ordinarily depends from a ceiling 2. The pipe1 is threaded. exteriorly at ftlireaded lower portion of the coupling 3.lhe tubular insulatil'ig member 5 is also threaded adjacent itsI lowerend to receive a ri'intlitlmt supports a casing T. The casing i tightlylncases the tubular insulating member 5 for a portion olf the length olthe latter and serves a double function of preventing expansion of thetubular insulating member on account of inherent defects in the materialor extraneous influences, such as teinperatine changes.

The nut G has a depending 'harmed with a central bore Q andV has itswall then ,Fashioned into link l() to which suitable suljiportingmembers. such as the linkv l1, .for supporting a lighting: iixtnre (notshown) may be secured.

The tubular insulating member 5 has an pliliquely directed lateralaperture extending through its wall above the upper end oif the casingi' at a spaced distancenbelow the lower end oile the coupling The upperand lower walls of the aperture l2 are het eled at 17 and 18.respectively. A plug 19 bereled at i9 that entirely iillsy the bore l-iof the tubular insulating member 5 is secured within the same with itsbeveled wall in alinement with the beveled upper wall of the aperture l2as shown. Electrical conducting wires fi-43 vfrom a lighting fixture orthe like (not shown) passed int-o the here lfl ol.' the insulatingmember 5 through the bore 9 of the extension 8 areguided when movedupwardly through the aperture l2 and may then be connected to the wires(not shown) that ordinarily project from the ceiling 2.

The usual canopy 15 is mounted on the casing 7 and secured in adjustedposition therealong, as shownJ by means of a set screw 1.6. The coupling3 in the form of the device illustrated is hexagonal in shape, as bestseen in Fig. 3 and therefore adapted to be engaged by an ordinary wrenchor the like.

From the foregoing description of the various parts of the device, theoperation thereof may be readily understood and requires no detaileddescription. The device is simple in construction and at the same timemeets all the commercial requirements for an electric Xture providedwith an insulated stem, without it being necessary to provide the usualinsulating joint. The tuextension 8 bular insulating member is entirelyconeealed from view by the casing 7 and the canopy 15, Wherefore thedevice may be ornamental in appearance or formed in any desired mannerto match other ixtures, While being at'the same time ell'ective for thepurpose intended.

One of the principal advantages obtained when the device is used in itspreferred form lies in the fact that the electrical conducting` Wires13-13 can be passed from the bore of the stem through the aperture 12Without the diilicultv that was usuall;7 encountered in accomplishingthis result prior to my invention.

claim:

l. In an electric fixture, an insulated stem consisting` of a tubularinsulating member threaded exteriorly at each end and formed With anobliquely directed lateral opening through its -Wall a predetermineddistance from the upper end thereof, a coupling screwing on the upperend of said insulating member and adapted for connection with a fixedsupport, a casing arranged to cover the lower portion of said insulatingmember to a point adjacent the lateral opening, a nut screwing on thelower end of said tubular insulating` member and 'formed to provide aseat for said casing, said nut being formed with a depending extensionhaving a central bore, said depending extension having a portion formedinto a link adapted Vto support a lighting fixture element, electricalconducting Wires arranged to enter the bore of the tubular insulatingmember through the central bore in 'the depending extension to said nutand to pass therefrom through the obliquely directed lateral opening,and means disposed in the bore of the insulating member above theobliquely di-A rected opening for divertingr the electrical conductingwires through said opening.

2. In an electric llxture, an insulated stem consisting of a tubularinsulating member having a bore, said tubular insulating member beinelorlned with an opening through its Wall at spaced distance trom theupper nd thereof, said opening haring beveled upper and lower walls,means connecting with the upper end of said insulating member forconnecting tho latter to a (ixed support3 means carried at the lower endoi said insulating member for supportingl a lighting ixture element,electrical comluctiug wires for connection with the lighting lixture andarralwed to enter the here of the insulating` member, and means Yforguiding the electrical conducting wires from the here of the insulatingmember through the opening in its Wall.

In an electric fixture, an insulated stem comprising a tubularinsulating member uniiform in diameter for its entire length and havinga lateral opening through its Wall, a plug inserted into the bore of'said tubular insulating member at the upper end thereof and disposedWithin the bore in position to divert a flexible member from the bore ofthe tubular insulating member through the latu'al opening, said plugbeing formed with the lower end thereof heveled to extend from a lowerhorizontal plane to a plane located above the lateral opening, meansconnecting with said insulating member at its upper end for securing thelatter to fixed support, and meanseonnecting with the insulating memberat its lower end for supporting a lighting fixture element.

FRANK LOWELL BUTLER.

